In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Prevent excessive number of frames In this case, the user constructed the parameters with maxpacksize 40 for rate 22050 / pps 1000, and packsize[0] 22 packsize[1] 23. The buffer size for each data URB is maxpacksize * packets, which in this example is 40 * 6 = 240; When the user performs a write operation to send audio data into the ALSA PCM playback stream, the calculated number of frames is packsize[0] * packets = 264, which exceeds the allocated URB buffer size, triggering the out-of-bounds (OOB) issue reported by syzbot [1]. Added a check for the number of single data URB frames when calculating the number of frames to prevent [1]. [1] BUG: KASAN: slab-out-of-bounds in copy_to_urb+0x261/0x460 sound/usb/pcm.c:1487 Write of size 264 at addr ffff88804337e800 by task syz.0.17/5506 Call Trace: copy_to_urb+0x261/0x460 sound/usb/pcm.c:1487 prepare_playback_urb+0x953/0x13d0 sound/usb/pcm.c:1611 prepare_outbound_urb+0x377/0xc50 sound/usb/endpoint.c:333
総合評価: CVE-2026-23208 は低リスク（32.1/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 0.12%、2 パーセンタイル） 推奨対応: 悪用情報と EPSS の推移を監視し、必要に応じて優先度を見直してください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置（高いほど相対的に深刻）を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ（新 − 旧） |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.02% | 0.12% | +0.10% |
| 2 | 2026-02-15 | — | 0.02% | — |
EPSS の全履歴 （全 2 件）
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 7.8 | 3.1 | HIGH |
|
1.8 | 5.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2026-23208 not yet assigned priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 3, resolved 2. | https://security-tracker.debian.org/tracker/CVE-2026-23208 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2026-23208 |
suse
|
medium | CVE-2026-23208 severity moderate: SUSE including 431 source package names (2.1.3-6.124:kernel-default-base-6.4.0-40.1.21.17, 2.1.3-7.105:kernel-default-6.4.0-40.1, …), 754 product×package rows across 59 product lines (Container suse/sl-micro/6.0/base-os-container, Container suse/sl-micro/6.0/kvm-os-container, … (59 product lines)): Fixed 341, Known Affected 231, Known Not Affected 157, First Fixed 25. | https://www.suse.com/security/cve/CVE-2026-23208/ |
ubuntu
|
medium | CVE-2026-23208 medium priority: Ubuntu including 157 source packages (linux, linux-allwinner-5.19, …), 1256 status rows across 8 suites (bionic, focal, jammy, noble, questing, trusty, upstream, xenial): DNE 871, ignored 173, needed 129, released 83. | https://ubuntu.com/security/CVE-2026-23208 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| linux | linux_kernel | >= 4.14.186, < 4.14.188 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 4.19.130, < 4.19.132 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 5.4.49, < 5.4.51 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 5.7.6, < 5.7.8 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 5.8, < 6.18.10 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | 4.4.229 | cpe:2.3:o:linux:linux_kernel:4.4.229:*:*:*:*:*:*:* |
| linux | linux_kernel | 4.9.229 | cpe:2.3:o:linux:linux_kernel:4.9.229:*:*:*:*:*:*:* |
| linux | linux_kernel | 6.19 | cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:* |
| linux | linux_kernel | 6.19 | cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:* |
| linux | linux_kernel | 6.19 | cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:* |
| linux | linux_kernel | 6.19 | cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:* |
| linux | linux_kernel | 6.19 | cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:* |